#container {
    position: relative;
    height: 700px;
    width: 1800px;
    border: 1px solid;
    margin: 100px auto;
}

#add_project,
#join_project {
    position: absolute;
    display: none;
    left: 200px;
    top: 0;
    height: 400px;
    width: 500px;
    /* border: 1px solid goldenrod; */
    border-radius: 15px;
    background-color: bisque;
}

#add_project input,
#join_project input {
    height: 30px;
    width: 70%;
    margin-left: 15px;
}

#add_project>label,
#join_project>label {
    display: flex;
    text-align: center;
    margin-top: 20px;
    padding-left: 10px;
    align-items: center;
}

#add_project>label:nth-child(2),
#join_project>label:nth-child(2) {
    align-items: flex-start;
}

#add_project textarea,
#join_project textarea {
    /* height: 30px; */
    width: 70%;
    margin-left: 15px;
}

.btn {

    display: flex;
    align-items: center;
    justify-content: end;
    height: 80px;
    width: 100%;
    margin-top: 40px;
    /* border: 1px solid; */
}

.btn button {
    height: 30px;
    width: 60px;
    background-color: rgb(51, 210, 216);
    margin-right: 20px;
}